Add Navier-Stokes benchmark.

benchmarks/base.js

Index: benchmarks/base.js
diff --git a/benchmarks/base.js b/benchmarks/base.js
index ffabf24ddafc91b308c328bcce3b000d3f789870..62c37e1208dad573db7e1b4bcb278240e1f3c9c1 100644
--- a/benchmarks/base.js
+++ b/benchmarks/base.js
@@ -1,4 +1,4 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -78,7 +78,7 @@ BenchmarkSuite.suites = [];
 // Scores are not comparable across versions. Bump the version if
 // you're making changes that will affect that scores, e.g. if you add
 // a new benchmark or change an existing one.
-BenchmarkSuite.version = '6';
+BenchmarkSuite.version = '7';
 
 
 // To make the benchmark results predictable, we replace Math.random